1. Division of Cardiology, Department of Medical SciencesCittà della Salute e della Scienza di Torino, University of Turin Turin Italy
2. Department of Heart and VesselsOspedale di Circolo & Macchi Foundation, University of Insubria Varese Italy
3. Cardiac Arrhythmia Center, Montefiore Medical CenterAlbert Einstein College of Medicine Bronx New York
4. Division of CardiologySant'Andrea Hospital Vercelli Italy
5. Cardiovascular DepartmentClinica Pinna Pintor, Policlinico di Monza Turin Italy